Helicopters work like this
By: [by] Basil Arkell and John W.R. Taylor.  With illus. by Frederick G. Cook.
Contributors: Taylor, John William Ransom, joint author.
Publisher: Roy Publishers
Published: 1957
Place of publication: New York
Language: eng
Number of pages: 62
Subjects: Helicopters -- Juvenile literature
Genres: Juvenile literature.